White has only one pawn for the piece, but Black has no simple way to get out of the pin. There's usually a theme of repeating moves with Qg3+ followed by Qf3, so White is risking less than it seems at first glance.
12. g3h4 [%c_effect h4;square;h4;type;Interesting;persistent;true] A move that looks very bold, but it's thematic. 12... g8g7  13. h2h3 A curious theoretical novelty. Firouzja invites Black to take the knight once again and, in addition, offers an alternative: capturing the pawn on h3. 13... g4f3  14. d1f3 